London: The UK government has admitted sending about 50,000 coronavirus tests to the US last week for processing after "operational issues" in British labs, media reports said on Sunday.
The Department of Health said that sending swabs abroad were among the contingencies to deal with "teething problems", the BBC reported.
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The samples were airlifted to the US in chartered flights from Stansted Airport, the Sunday Telegraph said in a report.
Results will be validated in the UK and sent to patients as soon as possible.
A spokeswoman for the Department of Health and Social Care (DHSC) said that expanding Britain's virus testing network had involved setting up an "entirely new" lab network to process tests, adding "contingencies" - such as sending swabs abroad - were in place for when "problems arise".